Journal article
Thermal history and exhumation of basement rocks from Mesozoic to Cenozoic subduction cycles, central North Island, New Zealand
R Jiao, D Seward, TA Little, BP Kohn
Tectonics | Published : 2014
DOI: 10.1002/2014TC003653
Abstract
A new thermochronological study of the basement rocks of the central North Island, New Zealand, records thermal and exhumation histories related to two subduction cycles since the latest Jurassic. The basement comprises metasedimentary terranes accreted onto eastern Gondwana during Mesozoic subduction. Since the Oligocene, these terranes have been located on the hanging wall of the Hikurangi subduction margin, overriding the Pacific Plate. Results of zircon fission track (121-264 Ma) analysis yield detrital or slightly reset ages; apatite fission track (19.8-122 Ma) and (U-Th-Sm)/He (10.3-95.2 Ma) ages are fully reset. Results from inverse thermal history modeling of the data of individual a..
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Funding Acknowledgements
The data for this paper are available in the supporting information Tables S1-S3. R. Jiao is funded by a Doctoral Scholarship from Victoria University of Wellington. Colin Wilson, Nellie Olsen, and Sarah Milicich kindly supplied us with some samples from the Kaimanawa Range. Fellow students Ben Hines and Joseph Kelly also contributed as field assistants. The thermochronology laboratory at the University of Melbourne receives infrastructure support under the AuScope program of NCRIS. This manuscript has been improved remarkably by comments and suggestions from Nick Mortimer and an anonymous reviewer.